NACE 25.2 – Manufacture of Radiators and Boilers for Central Heating | Public Tenders

NACE 25.2: Radiators and central-heating boilers in public procurement. CPV codes, contracting authorities and procurement procedures for heating systems.

Definition: NACE 25.2 covers the manufacture of metal radiators, radiators and central-heating boilers used for space heating in buildings. These products are core components of modern building heating systems.

Legal basis: NACE Rev. 2 (Regulation (EC) No 1893/2006) · Last updated: January 2026

What does NACE 25.2 cover?

NACE 25.2 (Manufacture of radiators and boilers for central heating) classifies manufacturers of heating-technology components — a core area of technical building services in public construction and refurbishment projects.

Class	Title	Typical outputs
25.21	Manufacture of central heating radiators and boilers	Panel radiators, tubular radiators, condensing boilers, low-temperature boilers

Products in this group are installed in new buildings and refurbishments. Central-heating boilers cover gas, oil and biomass firing. Radiators are found in virtually all public properties.

Public tenders: heating-system tenders

Radiators and boilers from NACE 25.2 are procured as part of new-build, refurbishment and modernisation projects on public properties — often embedded in overall building-services packages.

Typical contract types

Schools and nurseries: replacement of outdated heating systems as part of municipal building refurbishment programmes
Administrative buildings: replacement of old oil and old low-temperature boilers with efficient condensing boilers
Social institutions: care homes, hospitals and sports halls require reliable heat supply
Military properties: heating modernisations on armed-forces properties
District-heating transfer stations: house transfer stations as the interface between district-heating networks and building heating

Relevant CPV codes

CPV code	Title	Application area
44620000	Boilers and radiators	Central-heating boilers and radiators
44621000	Radiators and boilers	Central-heating components
44621110	Radiators	Panel radiators, tubular radiators
44621200	Boilers	Gas, oil and biomass boilers
39715000	Water heaters and heating systems	Complete systems including controls

Contracting authorities and bidders

Public contracting authorities

Public property administrations (Federal Real Estate Company BIG, Federal Real Estate Agency BImA), school authorities, municipal building departments, hospital and care-home operators and the armed forces are among the principal contracting authorities. Heating modernisations are often co-financed by funding programmes (e.g. the German federal funding for efficient buildings).

Bidders and eligibility requirements

CE marking and ErP Directive: boilers must comply with the Ecodesign Regulation (EU) 813/2013
Installation businesses: usually combined with installation services by sanitary, heating and air-conditioning (SHK) specialists
Product certificates: DVGW approvals for gas-fired boilers, TÜV and CE testing
Reference list: comparable installations in public buildings

Frequently asked questions on NACE 25.2 and public tenders

Are radiators and boilers awarded as supply or works contracts? Pure supplies fall under supply thresholds; combined supply and installation are treated as works (where installation predominates) or mixed contracts. Heating installation services fall under NACE 43.22.

Must new boilers in public buildings comply with certain energy classes? Yes. Under the Ecodesign Regulation, fossil low-temperature boilers are no longer permitted. Contracting authorities increasingly tender heat pumps, biomass boilers or hybrid solutions, which influences the CPV selection accordingly.

NACE C – Manufacturing: parent section
NACE 25 – Fabricated metal products: parent division
NACE 25.3 – Steam generators: industrial boilers
NACE 27.5 – Domestic appliances: related household technology

Last updated: January 2026 All information provided without warranty. For legally binding advice, please consult a law firm specialising in public procurement.